Year	Number of
1990	2760.07
1991	2855.95
1992	2959.45
1993	3059.72
1994	3167.46
1995	3284.21
1996	3346.77
1997	3410.46
1998	3475.27
1999	3548.17
2000	3631.85
2001	3787.41
2002	3959.22
2003	4158.86
2004	4372.75
2005	4600.25
2006	4800.93
2007	5011.2
2008	5251.98
2009	5509.39
2010	5786.18
2011	6074.92
2012	6384.25
2013	6716.29
2014	7065.55
2015	7431.94
2016	7827.94